svn commit: r518679 - in head/devel/dmlc-core: . files

[Piotr Kubaj]

Should be fixed in r518698.

On 19-11-30 00:17:48, Jan Beich wrote:
> Piotr Kubaj <pkubaj at FreeBSD.org> writes:
> 
> > Author: pkubaj
> > Date: Fri Nov 29 22:24:45 2019
> > New Revision: 518679
> > URL: https://svnweb.freebsd.org/changeset/ports/518679
> >
> > Log:
> >   devel/dmlc-core: fix build on GCC architectures
> >   
> >   Use USES=compiler:openmp instead of hard dependency on ports LLVM. Use new GCC when using base GCC.
> 
> - USES=compiler:openmp currently forces GCC. See also bug 210337.
> - GCC uses libstdc++ which cannot be used together with libc++
>   due to a conflict between libsupc++ and libcxxrt [1]
> 
> $ echo 'int main() {}' >a.c
> $ cc a.c -L/usr/local/lib -ldmlc -ltvm
> $ ./a.out
> Segmentation fault
> $ ldd a.out | fgrep c++
>         libstdc++.so.6 => /usr/local/lib/gcc9/libstdc++.so.6 (0x801b97000)
>         libc++.so.1 => /usr/lib/libc++.so.1 (0x8023f5000)
> 
> [1] https://wiki.freebsd.org/NewC++Stack#Mixing_Libraries_using_Libc.2B-.2B-_and_Libstdc.2B-.2B-
>     https://svnweb.freebsd.org/changeset/base/233749
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